Cryptography

Links

• Hashing security
• The Risks of Key Recovery, Key Escrow, and Trusted Third-Party Encryption
• The Mathematical Guts of RSA Encryption
• Disk encryption
• How are passwords stored in Linux (Understanding hashing with shadow utils)

Password hashes

Password hash types, identified by first field

• $1 = MD5 hashing algorithm.
• $2 =Blowfish Algorithm is in use.
• $2a = eksblowfish Algorithm
• $5 =SHA-256 Algorithm
• $6 =SHA-512 Algorithm
• $P = phppass/joomla/wordpress MD5

crypt

man 3 crypt

On freebsd

• http://www.freebsd.org/doc/en/books/handbook/crypt.html